Pressure cooker



FIG. 1 is a front elevational view of a pressure cooker in accordance with the present design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a side elevational view thereof of the side opposite to the side shown in FIG. 3;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view thereof. 

The ornamental design for a pressure cooker, as shown. 